Clothing Size Calculator

For Shirt / Top, US, UK, and EU sizes are looked up from Bust / Chest alone through a fixed inch-bracket table (lines 18-26). Waist enters only the Fit Recommendation for shirts, where the engine subtracts Waist from Bust and compares the difference to six- and ten-inch thresholds (lines 28-32). Changing Waist therefore can change fit advice without moving the reported size labels.

Dresses ignore whichever of Bust / Chest or Hip is smaller and size from Math.max(bust, hip) against a separate dress chart with combined labels such as 6-8 (M) (lines 52-60). Shirts read Bust / Chest only and never consult Hip. Dress Fit Recommendation then uses Hip minus Waist with ten- and six-inch thresholds similar to shirts but pointing toward silhouette styles instead of shirt cuts (lines 62-66).

When Garment Type is Shoes, the engine assigns the Bust / Chest input to a foot- length variable measured in centimeters and maps it through a shoe-specific size chart spanning US, UK, and EU footwear labels (lines 69-80). Waist, Hip, and Inseam are not read in that branch at all. Fit Recommendation is a fixed brand-variance sentence rather than a measurement-derived result (line 82).

Pant US, UK, and EU sizes come exclusively from Waist through a numeric chart with no inseam term (lines 35-43). Inseam is consulted only afterward for Fit Recommendation, compared against breakpoints at 28, 30, 32, and 34 inches to suggest petite, regular, long, or extra-long lengths (lines 45-49). A longer inseam changes length guidance without changing the waist-based size number.

Bust-Waist Difference starts at zero (line 14) and is only overwritten in two branches: Shirt / Top assigns it Bust minus Waist (line 29), and Dress assigns it Hip minus Waist (line 63). The Pants / Trousers and Shoes branches never touch the variable, so it reports its untouched zero default for those garment types -- it is not an error, those garments simply don't have a bust/waist relationship this calculator models. Use Fit Recommendation instead for guidance in those two modes.